http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-I272416-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9683deb4c84cb1894b509ea66b55d28f |
| filingDate | 2005-11-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2007-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f7f0f9e26c81fe27ad13296b31e5bb0f |
| publicationDate | 2007-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-I272416-B |
| titleOfInvention | Four-pieces lens assemblage |
| abstract | This invention relates to four-pieces lens which were assembled with an aperture, a first lens, a second lens, a third lens and a fourth lens in proper order from the object side. The first lens is a double-convex lens. The second lens is a double-concave lens or a minus planoconcave lens, and the object side of the second lens is engaged with the image side of the first lens. The third lens with one aspheric refraction surface at least is a convex lens which faced to the image side with convex surface. The fourth lens with one aspheric refraction surface at least is a convex lens which faced to the object side with its convex surface. Thereby the second lens can ensure the stronger ability of negative refraction and ensure the back focus as the carried lens required. While using the first lens and the second lens as a connecting lens, the connecting surface of the convex surface faces to the object side, and the second lens with the concave surface (or flat surface) facing to the image side is added. The two lenses can be made with high refractive material which are applicable for the lens assemblage with high resolution picture element, and they can not only ensure the back focus but restrain the length of the lens assemblage. |
| priorityDate | 2005-11-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID65130 http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419484141 |
Total number of triples: 12.